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(No Model.) 6 Sheets-Sheet 1.

T. B. HARRISON.

TYPE WRITING MACHINE.

No. 394,178. Patented Dec. 11 1888.

(No Model.) e Shets-Sheet 2.

T. B. HARRISON.

TYPE WRITING MACHINE. No. 394,178. Patented Dec. 11, 1888.

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6 Sheets-Sheet 3.

(No Model.) 8

T. B. HARRISON.

TYPE WRITING MACHINE. No. 394,178. 2-7 Patented Dec. 11, 1888.

6 Sheets-Sheet 4.

(No Model.)

T. B. HARRISON.

TYPE WRITING MACHINE. No. 394,178. Patented Dec. 11, 1888.

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(No Model.) 6 Sheets-Sheet 5.

T. B. HARRISON.

TYPE WRITING MACHINE.

No. 394,178. Patented Dec. 11, 1888.

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(No Model.) 6 Sheets-Sheet 6.

T. B. HARRISON.

TYPE WRITING MACHINE.

No. 394,178; Patented Dec. 11, 1888.

fi fnesses: @Z Q jam/m4 I NITE STATES PATENT Orricn.

THOMAS E. HARRISON, OF ANDERSON, INDIANA, ASSIGNOR TO THE HARRISON TYPEVVRITER COMPANY, OF SAME PLACE.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 394,178, dated December11, 1888.

Application filed February 12, 1887. Serial No. 227,440. No model.)

.T at whom it puny concern.-

Be it known that I,THOMAS B. HARRISON, a citizen of the United States,residing at Anderson, in the county of Madison and State of Indiana,have invented a new and useful Type-Yriting Machine, of which thefollowing is a specification.

My invei'ition relates to ty 'ic-writcrs such as are used for ordinarytype-writing, and has to for its object to provide a cheap, simple, andlight type-writer. This object I accomplish by the mechanism illustratedin the accompanying drawings, wherein Figure l is a plan view of themachine with the upper parts removed. Fig. 2 is a crosssection of themachine with certain parts omitted. Fig. 3 is a side View of themachine, showing the ribbon operating mechanism. Fig. 4- is a plan viewof the machine with the key-board and parts removed. Fig. 5 is a planview of the key-board. Fig. 6 is a rear view of the printing-roll. Fig.7 is a plan view of the base of the machine. Fig. 8 is an elevation ofthe ribbon-operating mechanism. Fig. 9 is a detail section view of theguidedrum. Fig. 10 is a detail of a key-bar. Fig. 11 is a detail of thepivot-block. Fig. 12 is an end view of the roller-platen. Fig. 13 is aplan view of the type-wheel. Fig. l l is a detail bottom view of theescapement mechanism. Fig. 15 is a detail of the miter-cam. Fig. 16 is asection of the type-wheel.

Like parts are indicated by the same letters in all the figures.

A is a key-board, on which are seen the keys A A, bearing the charactersA A also, the central spacer-key, A and the side keys, A A which areused to change the case, as herein explained.

A is a beveled edge about such board, which, togetl'ier therewith, formsa sort of case.

A A are key-shanks pivoted to the keybars at the point A and bearing thekeys A A.

A" is a thiinble on the bottom of the spacerkey, which slides upon theportion A of the inverted cup A, which is secured to the keyboard. Aspiral spring, A constantly urges the spacer-key upward. At the base ofthe case lies the ring l3, having therein the screwholes l3 l3, toreceive the pivot-blocks )2 B and also in front of such holes thevertical cylindrical spring-pockets l5 ll, in which lie the spiralsprings H B. Attached to this ring, 5 5 and forming a support for thecentral part of the machine, is the spider-frame 113", having the legs13 B" and central portion or ring, B In these pivot-blocks are pivotedthe key-bars B which are constantly urged upward by the spiral springsl5 ii" in the springpockets B3 B3. -0

(l are vertical rods passing from the circular portion or ring B to thering 0 abm'e, thus li'orming a sort of barrel with a series of verticalways or guides therein.

is a collar secured to the circle B by the bolts and projecting to andinside of the barrel and notched all around its edge, so as to form theslots O C.

I) is a rod which passes up through the center of the guide-barrel andenters the sleeve D, and also the spiral spring A. The sleeve D isprovided with a collar, D below and a nut, D above, whereby it isjournaled in the key-board so as to rotate freely, but not toreciprocate. Secured to this sleeve by the supports I) D are .Ihc twoguidoways D D which together form a mitershaped cam. These two guidewayscome together above at the sharp edge D and terminate below in the longslot D through which projects the arm D from the rod D. This arm limitedin its downward motion by the end of the slot D and thus it limits thelength of the reciproca tion of the rod D. It also long enough to enterthe slots 0*, and thus when forced downward by the key-bar B it issecured in the lock-slots O and prevents the cam, sleeve, and rod fromfurther rotating. On this rod is a collar, D, which rests upon the upperportion of the hammer E. This hammer is pivoted to the central mainsupporting-shaft, F, and has a large slot, E, to permit the passage ofthe rod D. At its outer extremity it terminates in a type-hammer, Onthis hammer E, and continuous therewith, is an escapement-tripper, E inthe form of a segmental circle, having the slot E. To keep the hammeralways elevated, there is a spiral spring, I00

E, coiled about the shaft F and attached to the hammer at the point Eand at itsother end secured to a collar, E", which is adjustablyfastened on the shaft by a setscrew, E Thus by turning this collar thetension of the spring may be changed.

G is a roller-platen journaled in the side pieces, G G, of the frame,which frame is also provided with the bar G and rod G On this latter rodare secured the wheel G and the adjustable stops G5 G, and also thebellslide G carrying the bell G spring-hammer G and a trip-lever, G 7

Longitudinal with the frame is a shaft or rod, G, which bears the curvedfriction-plate G, which guides the paper. 1 is a scale on suchfriction-plate.

On the end of the roller and rigid therewith is a ratchet-wheel, H.

Pivoted concentric with the roller is a lever, I-I, having a dog, 1-1with the spring H On the side frame, G, there is an arc-shaped slot, H,with a set-screw therein, H which screw engages the lever H and limitsits motion. On the lever H there is a pin, l-I, projecting into thisslot. There is also a spring, H on the side frame, which constantlykeeps the lever erect.

K is a base-plate having the groove K therein, said groove forming a waydownwardly inclined from right to left. This groove is designed to forma way for the strip K to travel in. Attached to the carriage there is aninclined strip, K pivoted to a hanger, K at one end at the point K andat the other end adjustably secured to a hanger, K by alocknut, K. Thisinclined strip travels in the inclined groove in the base. The centralsupporting-shaft, F, is journaled in standards F F, and to it arepivoted the frame-pieces F F.

L L are arms rigidly secured to the shaft F F near its bearings F andpivoted on the pieces F F in the bosses L L L L are guideways or pinsprojecting from the frame-pieces F at the front ends and passing throughthe eyes in the hangers L.

L and L are crooked key-bars passing from the keys A A through eyes inthe arm L", which is secured to the main supportingshaft F. Each ofthese key-bars bears a nut, L adjustably secured upon it; and whichrests upon the top of the arm L The arms L and L together with the shaftF, to which they are secured, form a sort of elbow-crank lever. Bydepressing either of the keys A or A the arm L will be depressed, theshaft F rotated, the arm L rocked, and the entire upper case will becaused to slide up on its guideways L On this frame, which carries thekeys, key-bars, and type-wheel, there are shafts M M, supported in thebearings M M on the part F Each of these shafts M carries aratchet-wheel, M and there is a ratchetbar, M which engages one of suchwheels. Each shaft M also is provided with a collar, M against which thespool M rests. The spool M is looked to the shaft, so as to rotatetherewith, by means of the pin M The spool M carries the inking-ribbon.

The corresponding ratchet-bar to the bar M is the ratchet-bar M pivotedat the point M to the vertical lever-bar M The ratchetbar 3 7 is forceddownward by the spiral spring M but may be raised by means of thehand-wheel M, which carries the cam M and is supported on the standard Mrising from the cross-piece M On this cross-piece there is a hanger, Mupon which the lever M is pivoted. On the shaft F there is a collar orloose sleeve, M having the groove M", which is engaged by the pin hifrom the lever M and a groove, M, which is engaged by the pin M from therock-shaft arm M This arm is rigid with the rock-shaft M which liesacross the frame in the groove M and is surrounded by and secured to aspiral spring, M which constantly tends to turn the rock-shaft M overtoward the right. At the opposite end of this rock-shaft is an arm, M011 which is a roller, M which roller engages the inclined way K 011 thecarriageframe.

The ratchet-bar M is provided with an arm, M, which passes through thehole in the corresponding arm, M on the ratchet-bar M On this arm M area pin, M, a collar, M and a spiral spring, M which spring bears againstthe arm M and the collar M so that when the ratchet-bar M is raised bymeans of the cam M the spring M will cause the ratchet-bar M to rise,and will thus throw it in contact with the ratchet-wheel M on the left.Thus it will be seen" as the carriage travels across the machine fromright to left its inclined way acts upon the wheel M and rocks the shaftM thus moving the sleeve M on the shaft F and throwing the lever Mtoward the left, and thus turning the ribbonwheel on the right, so as togradually move the ribbon toward the right. WVhen it is desired toreverse the action of the ribbon, it is done by turning the hand-wheel Mthus raising the ratchet-bar M and, as above explained, bringing theribbon-spool at the left into operation.

Rising from the center of the base is the curved frame-piece N, havingthe arm N, in which is journaled the shaft N which carries the pinion Nwhich engages the rackbar N on the carriage-frame. The shaft N projectsinto the cylinder N in which is contained the clock-spring N which issecured to the shaft N so as to tend to rotate it and move the rack andcarriage-frame to the left. The frame-piece N is provided with thepointer or indicator N and in its forward 'end with a vertical shaft, Non which is secured the pinion N", which engages the rack-bar N on thecarriage-frame. Secured upon this shaft is also a ratchet-wheel, N aslotted disk, N ,looked to such ratchet-wheel by the spring-dog, N Thisslotted disk is also provided with an arc-shaped slot, N and adownwardly-proj ectin g pi n,N and the spring N secured to the latterpin and bent around and hooked 011 to a pin, N, which projects upwardlyfrom the lower slotted disk, N", through the slot N The action of thislat ter pin is to throw the slotted disk N around until its pin Nengages the right-hand end of the slot N Moving in these radial slots Nof the two disks is the segmental tripper lYhen the lower edge of theslot E engages the lower disk, the upper ei'lge releases the upper diskand permits the latter to move the distance of the arc-shaped slot N andwhen the lower disk is released the upper disk is held by the upper edgeof the slot E and the lower edge is permitted to rotate the distance ofthe slot N which is the distance of one cog on the pinion N". Thispermits the rack-bar to move one cog to the left, or the distance of oneletter.

O is a type-wheel having type 0 thereon. The type-wheel O is securedagainst the collar O of the shaft D and held in position thereon bymeans of the pin 0 projecting from such collar, and the spring-washer 0,held against such type-wheel by the nut 0 S is a pin rising from thebase, adapted to trip the lever which operates the bell.

S and S are pins at the extremity of the base to engage the adjustablestops and limit the motion of the carriage.

T is a slot in which the tripping-segment moves.

The disk N is loose upon the shaft N and the disk N is locked thereto bymeans of the ratchet-wheel and spring-dog, so as to be locked to androtate with the shaft N, while the carriage moves toward the left, sothat when the carriage is drawn back toward the right, the disk l\ beingheld by the tripper, the spring-dog slides upon the ratchet-wheel andthe shaft N is free to rotate, though both of the disks N and N are keptfrom rotating.

U is the ribbon.

It will be observed that in Fig. 1i the parts are shown as if turnedupside down, in order that the ratchet-bar may be exhibited and thepinion and rack-wheel, and to do this more effectually the lower plateis almost entirely removed, and the pin which projects upwardly from it(marked N is shown in section.

I have by necessity described many features not of my invention, butnecessary to a comprehension thereof, and reference must be had to theclaims for a more specific setting out of what I regard as my invention.

The use and operation of my invention are set out in thefollowing-described use and operation of the devices wherein they arecontained.

First, the keys, key-board, key-ring, and key-bars; second, the typeplate and shaft, miter-cam, type-bar, and guide-barrel for the key-bars;third, the rack, springaetuated pinion, and an escapement whereby thepapercarriage is driven; fourth, mechanism for feeding the paper; fifth,the ribbon'feeding devices; sixth, a mechanism whereby the type arechanged from upper to lower case.

First. The upper part of the machine consists of a ring and case or topthereon, through which latter project the keys arranged in two ringsconcentric with the case. At the beveled left-hand side of the case aretwo keys which are used to change the case of the type, and in thecenter is an elevated spacer-key. Each of these keys bears onecharacter, and some of them two. The characters are indicat-ed upon thesurface of the key thus: Key A, bearing the Roman letter A, would printthe Roman letter A when the upper-case was being used and the smallletter a when the lower-case was being used, and the portion of thebrace (when the points, figures, and signs are being used. Each of thekeys is supported upon a shank, which shanks are bent on the inner rowof keys outwardly and on-the outer row of keys inwardly, and thenpiyoted to the key-bar, so as to engage the bars at equal distances fromthe pivoted points. Each of these bars is pivoted, as indicated, in astandard 011 the ring which lies beneath and at the edge of thecase,-about the circumference thereof. The other end of each of suchbars passes between two of the vertical rods, which form theguide-barrel at the center. Each of these key-bars is upwardly forced atits outer extremity by means of a small spiral spring lying in aspring-pocket underneath the bar and a short distance in front of thepivotal point thereof. Thus it will be observed that when any key isdepressed its bar will be equally depressed, and that all bars will beequally depressed, also that the key will be constantly returned to itsposition after use by means of the spiral spring in the spring-pocket.The end of the key-bar is sharp-edged.

Second. At the center of the machine there is found a vertical barrelconsisting of upper and lower rings with vertical rods connecting them.Between these rods pass the inner ends of the hammers. Pivoted in thecenter of this barrel is a sleeve which contains a rod from whichprojects an arm. On this sleeve is secured a miter-cam, shaped as shown.The sleeve at its upper extremity has a collar and nut, whereby it issuspended from the keyboard above, so as to be free to rotate, but notto descend. The cam portion consists of two curved downwardly-inclinedledges, which are united at their upper ends at a sharp edge andterminate at their lower ends in a vertical slot, at the lower extremityof which they are again united. The arm 011 the type-plate shaft or rodin the sleeve projects through this lower slot, and the parts are soconnected and held that the arm never escapes from the slot. The innerends of the key-bars are in such position as always to be directly abovesome portion of the miter-cam ledges, and when any such keybar isdepressed it immediately engages such cam, causes it to rotate upon thekey-board, and the extremity of such key then descends into such slotand engages the arm from the shaft or red in the sleeve and forces sucharm down to the lower extremity of said slot. About the inner lower endof the guide-barrel is a collar with a series of lock-slots, into whichthis arm from the rod descends, and thus the rod and plate are centeredand securely held in position as it reaches the end of its downwardstroke. At the lower end of the rod there is a collar which bears uponthe hammer. This hammer is constantly forced upward by a spring,which-is coiled about the supporting-shaft, as hereinafter described, so thatthe type-plate shaft itself is constantly forced upward, and thereforeimmediately returns to position when any key is released. Thepivot-ring, typecase, key-board, keys, key-bars, guidebarrel,

miter-cam, and type plate and shaft are supported by arms from the mainsupportingshaft, an d by arms which slide on guides on a frame pivotedto the same shaft. The entire key bearing and operating mechanism can bemoved up or down on such guides. At the outer lower end of thetype-shaft is fixed a type-disk, upon which the type are arranged inconcentric circles, as shown in the drawings. Each key, when depressed,causes its bar to descend between. the rods of the guide-barrel andalong the ledges of the miter-cam, thus turning the said cam until itsslot is directly below the end of the key-bar. As the cam is so turnedthe typeshaft is turned with it, thus also turning the type disk orplate on the end of such shaft. This shaft and disk are so arranged withrelation to each other and the type on the disk are so placed withreference to the key-bars that as the key-bar which bears, for example,the letter A turns the cam and shaft until it has entered the slot ofthe cam it brings the letter A on the disk directly under the extremityof the type-bar. As the key-bar further descends into its slot it forcesdown the arm on the type-shaft and also the hammer and plate, and thuscauses the end of the hammer to descend upon the outside of the elastictype-disk which is above the letter, and thus forte it down upon theribbon, so as to make the impression upon the paper. This hammer ispivoted upon the main supporting-shaftof the frame, about which is wounda spiral spring, one end of which engages such hammer and keeps italways elevated when not in use. The other end is secured to a collaradjustablyfastened by a set-screw. This hammer is, slotted to receivethe lower end of the typeshaft. The type-disk is below and the collar onthe shaft or rod is above the hammer.

Third. On the front of the paper-carriage, and at the bottom thereof, isa rack which engages the pinion on a sort of a capstan-shaft, the latterbeing inclosed in a cylinder on the frame. This shaft has wound about ita strong springlike a clock-spring, which tends constantly to unwind it,and thus to rotate the pinion and force the paper-carriage toward theleft. The escapement, which regulates the motion of the carriage, towardthe left, consists of two slotted plates journaled upon a verticalshaft, the lower secured to the upper by means of a vertical pin, whichrises from the lower and passes through the short slot in the upper, anda spring which is secured to a dependent pin on the upper plate at oneend and which bears against the pin on the lower plate at the other end.The upper plate is secured by a spring-dog to a ratchetwheel on theshaft. The pinion on the shaft engages the rack-bar. On the hammer thereis a tripper consisting of a segment of a circle, which as the hammerrises and lowers turns about the center, which is also the center of themain supporting-shaft. The edge of this segment is slotted by a slotwhich is a-little narrower at its mouth than the distance between thetwo slotted plates. This segment engages the slots in the plates. Nowwhen the hammer is depressed the lower plate is first released by theslot in the segment, and when the hammer rises after the type has beendepressed and the impression made the upper plate is released just atthe moment that the lower plate is again engaged by the segment. Theupper plate will thus rot-ate the distance permitted by the slot in itssurface and the pin which projects therein from the lower plate. Thisslot is of a length equal to the distance between the slots in thecircumference of the plates, and of such a length as to permit therotation of the pinion and its shaft far enough to move the hammer onetooth. This action takes place every time the hammer descends. Thespring which connects the two plates is very weak, and only strongenough to bring the lower plate around the length of the slot in theupper when it is released from the segment. The carriage consists oflongitudinal pieces, one of which is T-shaped in cross-section, asshown, and which slides in the groove on the base-board. At

the other side there is a longitudinal rod hav-- ing two stops withset-screws, so that the motion of the carriage may be limited in eitherdirection, there being two pins to engage the stops on the base-board.On this rod there is also a wheel which runs on the frame and supportsthe carriage. Upon it there is also secured an alarm-bell, which isattached by a set-screw, so as to be adjustable in its position. Thealarm-bell consists of the sounding portion with a spring-hammer and apivoted lever which engages a third pin on the base-board, so that thebell is struck when its lever is moved by the motion of the carriage inone direction, but is not sounded when the carriage is moved in theopposite direction. There is another longitudinal rod on the carriageframe, which supports the frictionsheath on which is the scale.

Fourth. At the extremity of the paper-carriage there is anupwardly-rising frame piece, upon which the printing-roll is jour-'naled. Concentric with this roll, and secured to it, is aratchet-wheel; also concentric therewith is a lever-arm which passesupward for a considerable distance. 011 the said frame of thepaper-carriage is an arc-shaped slotconcentric with the roller-platen,and in it are fixed a set-screw and locking-piece. The lever-arm has aspring-pawl which engages the ratchet-wheel when the line of type hasbeen written, and it is desired to feed the paper another line thelever-aim is pushed from the operator and its pawl engages theratchetwheel and moves the roll er-platen the distance on one line. Thespace between the lines is determined by the position of the set-screwin the arc-shaped slot. There is also a spring on the side frame, whichconstantly bears against the le"erarm so as to keep it always elevated.

Fifth. The ribbon-feeding device or mechanism for carrying the ribbon iscoi'nposed as follows: There is an inclined way pivoted to the hanger onthe left-hand end of the papercarrier, and adjustably secured by meansof the thi'lmb-screw and bolt to a slotted hanger on the right-hand endof the machine, so as to be upwardly inclined toward the right. This waymoves in an inclined groove in the base. J ournaled transversely on thebase-board at a point a little to the left of the center of the machineis a rock-shaft having two arms, one extending longitudinally with theprintingroll and underneath the same and hearing at its outer extremitya small wheel which runs on the inclined way, the other extendingvertically upward and provided with a pinwhich engages a grooved sleeveon the main supporting-shaft, as will be clearly seen in the drawings.The wheel rolling on the inclined way will rotate the rock-shaftslightly as the carriage moves, and thus cause the sleeve to slide onthe supporting-shaft. Now this sleeve is provided with another groove,inwhich is received a pin on the vertical lever, which is pivoted inhangers below the supporti ng-shaft and extends a considerable distanceabove the same, so that the motion imparted to it by the sleeve carriesits upper extremity through the space about twice the distance traveledby the sleeve on the shaft. To the upper end of this lever is secured aratchet-bar, which passes toward the right and engages a ratchetwheel ona shaft which is suspended in hangers at the side of the frame andcarries one of the ribbon-spools. This ratchet-wheel is depressed by aspiral spring, so as constantly to be engaged with the ratchet-wheel onthe shaft. At its inner extremity it has a downwardly-turned end, so asto form a sort of bellcrank lever, and this lever engages the up wardend of the second bell-crank, which is pivoted to the vertical lever,and whose other end extends toward the left and is provided with aratchet edge which en the ratchet- Wheel, which in turn operates theribbon-spool on the left of the machine. The first bellcrank lever has apin which projects through a slot in the second and bears the spiralspring and collar, as and for the purpose indicated. \Vhen one of theratchets is out of gear, the other is in operation, and they may bealternately used, as is above set forth. The handwheel and cam are usedto throw the right-hand ratchet out of gear and at the same time tothrow the left-h and one in. The ribbon-spools have perforations in bothends, which receive pins in disks on the shaft for which they aredesigned, so that the spools revolve with their shafts. If it is desiredto turn the ribbon so that its edges can be alternately used, it is doneby removing the spools and reversing them.

Sixth. At the side of the key-board are placed the two keys marked Capsand Points. The machine in its ordinary position is adapted to write thelower-case letters, and if it is desired to write capitals the keymarked Caps is depressed. This key has a lower rod screw-threaded andbearing a nut thereon. This lower end of the rod passes through the slotin the arm, which is fastened on the main supporting-shaft of themachine. Another arm from this shaft is pivoted to the case, whichcarries the keys and parts above described. Now, when the key markedCaps is depressed, it operates the arms and shaft, and thus slides thekey-case upward on its inclined supports or guides, so as to bring thesecond row of type in position to be used. \Vhen the points, figures,&c., are to be used or the characters on the inner circle, the keymarked Points is depressed and in like manner it operates the arms andshaft, and, being near to the pivotal point thereof, it slides thekey-case farther up its incline. The stops on these two keys limit thelength of their stroke, and the length of that stroke can be set bymeans of the nuts on thcscrewthreaded lower ends thereof.

The machine set up ready for operation, as shown in cross-section, isoperated in the fol lowing manner: The type desired to be struck isfirst found on the key-board, and the key bearing it is then depressed.This causes the inner end of said key to pass downward between thevertical rods in the guide-barrel and it engages the ledge of themitercam. This causes the latter to rotate, carrying with it the rodwhich its sleeve contains, and also the type-wheel. below. It continuesthis process of rotation until the end of the key-bar enters the slotiii the lower end of the cam. At this point the disk will be found tohave rotated to such a point that the letter on the key which has beendepressedis the same letter as that which. has been brought bcn eath theend of the hammer. As the stroke continues,

the key 7-bar continues to descend until it strikes the arm on thetype-plate shaft or rod, which arm it causes to descend into the slot onthe cam, and then into the lock'slots on the ring about the base of theguide-barrel. Here it is securely locked, so that neither the cam,sleeve, rod, or type-disk can further rotate.

and sleeve, the latter suspended so as to ro- The continuation of thestroke by the action of the key-bar on the arm from the rod forces therod to descend until the type is brought upon the disk in closeproximity to the ribbon. The collar on the rod then. engages or bearsupon the upper part of the hammer and forces it down, so that its outerend strikes the type-disk above the type to be used and causes it tomake an impression. It will be observed that, the type-disk descendingin the right line and the hammer being pivoted at one end, its outer endwill travel a greater distance than thetype-disk, and thus will strike ablow against the outer edge of such disk. XVhen the key-bar is released,it is immediately forced upward into its normal position by the springin the spring-pocket. The next key used produces the same result. If nowit is desired to space without the use of the type, the spacer-key isdepressed and .the rod, type-plate, and hammer are depressed,

not far enough, however, to make an impression upon the type, but justfar enough to cause the tripping segment-plate on the typebar to releasethe escapement and permit the carriage to travel the space of oneletter. As the hammer descends during such action the slotted segmentwhich it bears begins to rotate in the disks of the two slotted plateswhich form the escapement. It first releases the lower plate, which isthen carried around the distance of the slot in the upper plate by meansof the spring, which is secured to the pin on the base of the upperplate and bears against the pin on the lower plate, which proj ectsthrough the slot. Vhen the carriage is carried back to the right of themachine to start its motion, the escapement is locked, so as not tooperate by the segment; but the rack is permitted to move by therotation of the shaft, which carries the ratchet-wheel about and doesnot rotate either of the slotted disks. hen it is desired to examine thework, the case is elevated, carrying with it the ribbon- Operatingmechanism and all the printing mechanism, and leaving nothing except theprinting-roller and pointer, which points directly at the'letter lastprinted. The paper is operated to write a new line, as indicated above.As the papencarriage or printingroller travels back and forth, itextends over the end of the base of the machine.

I claim- 1. The combination of a guide-barrel having vertical guideways,a collar having lockslots to register with such ways in the basethereof, and key-bars pivoted concentric with such barrel and moving insaid ways, and a type wheel and shaft within said barrel.

2. In a type-writer, a miter-shaped cam with a sharp edge above and aslot below, in combination with a type-plate and rod secured together,so that the rod and plate rotate with the cam and the rod reciprocatesin the sleeve. 3. The combination of a type-plate and rod tate freelywith the miter-shaped cam, having a sharp edge above and. a slot below,said cam secured on the sleeve, an arm on the rod which extends into thevertical slot on the cam, so that the rod and plate rotate with the camand reciprocate in the sleeve.

4. The combination of a type-plate and rod and suspending sleeve with acam shaped as shown, an arm from said rod projecting into the slot onthe cam, and a collar provided with locking-slots, which receive the armfrom the rod, and thus lock the plate from further rotation.

5. The combination of a type-plate, central rod, and suspending sleevewith a cam shaped asshown on said sleeve, guidebarrel concentrictherewith, a collar provided with lockingslots at the base thereof, andan arm on the rod, whereby the cam and rod are locked together and bothare locked from further rotation when the arm enters the lock-slots.

6. The combination of a type-plate, rod, and suspending sleeve with camshaped as shown, a guide-barrel and collar with locking-slots, an arm'on the rod projecting into the slot on the cam, and key-bars concentricwith the barrel, which, when depressed, rotate the cam and plate, andthen by forcing the arm on the rod into a lock-slot prevents the wholefrom further rotation. I

7. Suitable guides, a type-plate and rod, and suspending sleeve, an armon said rod, a cam attached to such sleeve and shaped as shown, with asharp edge above and a slot below, and key-bars, the inner ends of whichrest above said cam, so that when they are depressed they first rotatethe cam and type-plate, then by engaging the slot in said cam lock thePlate in position, and then by engaging the arm on said rod cause theplate to descend.

8. In a typewriter, the combination of a hammer, a type-plate providedwith a supporting-rod under the same, a collar 011 said rod just abovethe hammer and adapted to engage the same, a sleeve which encircles saidrod, an arm on said rod, a cam shaped as shown and secured to thesleeve, and keybars, which engage the cam and by being depressed causethe same, together with the plate, until the collar 011 the rod engagesthe hammer and causes said hammer to strike the back of the edge of saidtype-plate and make the impression.

9. The combination of a pivoted hammer provided with a hammer at oneend, and typeplate, rod, and collar which engages the hammer, pivotedkeys and lock-slots, and a cam about the rod, so that the keys firstturn the cam and type-plate in a proper position, then depress the plateand hammer, at the same time locking them to prevent further rotation.

10. The combination of a paper-carriage, an

escapement mechanism which limits its motion, a hammer havingatripping-edge Which operates the escapement,a type-wheel, a rod thereonwhich operates the hammer, and a spacer which engages such rod andslightly depresses it, so as to cause the tripping-edge carriage with aninclined way thereon, a rock-' shaft at right angles thereto, providedat one end with a rock-arm which is engaged and raised by the inclinedWay, and at the other with an arm, a sleeve 011 the central shaft, a pinfrom the latter arm, which engages such sleeve and ri bbon-actnatedmechanism, which receives its motion from the sleeve as it isreciprocated on the shaft.

13. In a ribbon-moving device, the combination of a ribbon-rollhavingaratchet-wheel with a ratchet-bar pivoted at one end, held against theratchet by the spring and adapted to be lifted therefrom by means of acamwheel.

14. The combination of a rock-shaft operated by the motion of thecarriage, a sleeve on the central s11pporting-shaft, operated by therock-shaft, a lever operated by the sleeve, and a ratchet-bar andratchet-wheel which it engages 011 the ribbon-roll.

15. In a type-writer, the combination of a type-case which supports thetype and a hammer and a snpportirig-shaft, on which the case and the barare pivoted.

THOMAS B. HARRISON.

Vitnesses:

SAMUEL J. SEIFRIED, FRANCIS W. PARKER.

